NetBSD-5.0.2/sys/dist/acpica/nsload.c
/******************************************************************************
*
* Module Name: nsload - namespace loading/expanding/contracting procedures
* $Revision: 1.4 $
*
*****************************************************************************/
/******************************************************************************
*
* 1. Copyright Notice
*
* Some or all of this work - Copyright (c) 1999 - 2008, Intel Corp.
* All rights reserved.
*
* 2. License
*
* 2.1. This is your license from Intel Corp. under its intellectual property
* rights. You may have additional license terms from the party that provided
* you this software, covering your right to use that party's intellectual
* property rights.
*
* 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
* copy of the source code appearing in this file ("Covered Code") an
* irrevocable, perpetual, worldwide license under Intel's copyrights in the
* base code distributed originally by Intel ("Original Intel Code") to copy,
* make derivatives, distribute, use and display any portion of the Covered
* Code in any form, with the right to sublicense such rights; and
*
* 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
* license (with the right to sublicense), under only those claims of Intel
* patents that are infringed by the Original Intel Code, to make, use, sell,
* offer to sell, and import the Covered Code and derivative works thereof
* solely to the minimum extent necessary to exercise the above copyright
* license, and in no event shall the patent license extend to any additions
* to or modifications of the Original Intel Code. No other license or right
* is granted directly or by implication, estoppel or otherwise;
*
* The above copyright and patent license is granted only if the following
* conditions are met:
*
* 3. Conditions
*
* 3.1. Redistribution of Source with Rights to Further Distribute Source.
* Redistribution of source code of any substantial portion of the Covered
* Code or modification with rights to further distribute source must include
* the above Copyright Notice, the above License, this list of Conditions,
* and the following Disclaimer and Export Compliance provision. In addition,
* Licensee must cause all Covered Code to which Licensee contributes to
* contain a file documenting the changes Licensee made to create that Covered
* Code and the date of any change. Licensee must include in that file the
* documentation of any changes made by any predecessor Licensee. Licensee
* must include a prominent statement that the modification is derived,
* directly or indirectly, from Original Intel Code.
*
* 3.2. Redistribution of Source with no Rights to Further Distribute Source.
* Redistribution of source code of any substantial portion of the Covered
* Code or modification without rights to further distribute source must
* include the following Disclaimer and Export Compliance provision in the
* documentation and/or other materials provided with distribution. In
* addition, Licensee may not authorize further sublicense of source of any
* portion of the Covered Code, and must include terms to the effect that the
* license from Licensee to its licensee is limited to the intellectual
* property embodied in the software Licensee provides to its licensee, and
* not to intellectual property embodied in modifications its licensee may
* make.
*
* 3.3. Redistribution of Executable. Redistribution in executable form of any
* substantial portion of the Covered Code or modification must reproduce the
* above Copyright Notice, and the following Disclaimer and Export Compliance
* provision in the documentation and/or other materials provided with the
* distribution.
*
* 3.4. Intel retains all right, title, and interest in and to the Original
* Intel Code.
*
* 3.5. Neither the name Intel nor any other trademark owned or controlled by
* Intel shall be used in advertising or otherwise to promote the sale, use or
* other dealings in products derived from or relating to the Covered Code
* without prior written authorization from Intel.
*
* 4. Disclaimer and Export Compliance
*
* 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
* HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
* IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
* INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
* UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
* IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
* PARTICULAR PURPOSE.
*
* 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
* OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
* COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
* SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
* CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
* HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
* SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
* LIMITED REMEDY.
*
* 4.3. Licensee shall not export, either directly or indirectly, any of this
* software or system incorporating such software without first obtaining any
* required license or other approval from the U. S. Department of Commerce or
* any other agency or department of the United States Government. In the
* event Licensee exports any such software from the United States or
* re-exports any such software from a foreign destination, Licensee shall
* ensure that the distribution and export/re-export of the software is in
* compliance with all laws, regulations, orders, or other restrictions of the
* U.S. Export Administration Regulations. Licensee agrees that neither it nor
* any of its subsidiaries will export/re-export any technical data, process,
* software, or service, directly or indirectly, to any country for which the
* United States government or any agency thereof requires an export license,
* other governmental approval, or letter of assurance, without first obtaining
* such license, approval or letter.
*
*****************************************************************************/
#define __NSLOAD_C__
#include "acpi.h"
#include "acnamesp.h"
#include "acdispat.h"
#include "actables.h"
#define _COMPONENT ACPI_NAMESPACE
ACPI_MODULE_NAME ("nsload")
/* Local prototypes */
#ifdef ACPI_FUTURE_IMPLEMENTATION
ACPI_STATUS
AcpiNsUnloadNamespace (
ACPI_HANDLE Handle);
static ACPI_STATUS
AcpiNsDeleteSubtree (
ACPI_HANDLE StartHandle);
#endif
#ifndef ACPI_NO_METHOD_EXECUTION
/*******************************************************************************
*
* FUNCTION: AcpiNsLoadTable
*
* PARAMETERS: TableIndex - Index for table to be loaded
* Node - Owning NS node
*
* RETURN: Status
*
* DESCRIPTION: Load one ACPI table into the namespace
*
******************************************************************************/
ACPI_STATUS
AcpiNsLoadTable (
ACPI_NATIVE_UINT TableIndex,
ACPI_NAMESPACE_NODE *Node)
{
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (NsLoadTable);
/*
* Parse the table and load the namespace with all named
* objects found within. Control methods are NOT parsed
* at this time. In fact, the control methods cannot be
* parsed until the entire namespace is loaded, because
* if a control method makes a forward reference (call)
* to another control method, we can't continue parsing
* because we don't know how many arguments to parse next!
*/
Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/* If table already loaded into namespace, just return */
if (AcpiTbIsTableLoaded (TableIndex))
{
Status = AE_ALREADY_EXISTS;
goto Unlock;
}
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"**** Loading table into namespace ****\n"));
Status = AcpiTbAllocateOwnerId (TableIndex);
if (ACPI_FAILURE (Status))
{
goto Unlock;
}
Status = AcpiNsParseTable (TableIndex, Node);
if (ACPI_SUCCESS (Status))
{
AcpiTbSetTableLoadedFlag (TableIndex, TRUE);
}
else
{
(void) AcpiTbReleaseOwnerId (TableIndex);
}
Unlock:
(void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/*
* Now we can parse the control methods. We always parse
* them here for a sanity check, and if configured for
* just-in-time parsing, we delete the control method
* parse trees.
*/
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"**** Begin Table Method Parsing and Object Initialization ****\n"));
Status = AcpiDsInitializeObjects (TableIndex, Node);
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"**** Completed Table Method Parsing and Object Initialization ****\n"));
return_ACPI_STATUS (Status);
}
#ifdef ACPI_OBSOLETE_FUNCTIONS
/*******************************************************************************
*
* FUNCTION: AcpiLoadNamespace
*
* PARAMETERS: None
*
* RETURN: Status
*
* DESCRIPTION: Load the name space from what ever is pointed to by DSDT.
* (DSDT points to either the BIOS or a buffer.)
*
******************************************************************************/
ACPI_STATUS
AcpiNsLoadNamespace (
void)
{
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (AcpiLoadNameSpace);
/* There must be at least a DSDT installed */
if (AcpiGbl_DSDT == NULL)
{
ACPI_ERROR ((AE_INFO, "DSDT is not in memory"));
return_ACPI_STATUS (AE_NO_ACPI_TABLES);
}
/*
* Load the namespace. The DSDT is required,
* but the SSDT and PSDT tables are optional.
*/
Status = AcpiNsLoadTableByType (ACPI_TABLE_ID_DSDT);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/* Ignore exceptions from these */
(void) AcpiNsLoadTableByType (ACPI_TABLE_ID_SSDT);
(void) AcpiNsLoadTableByType (ACPI_TABLE_ID_PSDT);
ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
"ACPI Namespace successfully loaded at root %p\n",
AcpiGbl_RootNode));
return_ACPI_STATUS (Status);
}
#endif
#ifdef ACPI_FUTURE_IMPLEMENTATION
/*******************************************************************************
*
* FUNCTION: AcpiNsDeleteSubtree
*
* PARAMETERS: StartHandle - Handle in namespace where search begins
*
* RETURNS Status
*
* DESCRIPTION: Walks the namespace starting at the given handle and deletes
* all objects, entries, and scopes in the entire subtree.
*
* Namespace/Interpreter should be locked or the subsystem should
* be in shutdown before this routine is called.
*
******************************************************************************/
static ACPI_STATUS
AcpiNsDeleteSubtree (
ACPI_HANDLE StartHandle)
{
ACPI_STATUS Status;
ACPI_HANDLE ChildHandle;
ACPI_HANDLE ParentHandle;
ACPI_HANDLE NextChildHandle;
ACPI_HANDLE Dummy;
UINT32 Level;
ACPI_FUNCTION_TRACE (NsDeleteSubtree);
ParentHandle = StartHandle;
ChildHandle = NULL;
Level = 1;
/*
* Traverse the tree of objects until we bubble back up
* to where we started.
*/
while (Level > 0)
{
/* Attempt to get the next object in this scope */
Status = AcpiGetNextObject (ACPI_TYPE_ANY, ParentHandle,
ChildHandle, &NextChildHandle);
ChildHandle = NextChildHandle;
/* Did we get a new object? */
if (ACPI_SUCCESS (Status))
{
/* Check if this object has any children */
if (ACPI_SUCCESS (AcpiGetNextObject (ACPI_TYPE_ANY, ChildHandle,
NULL, &Dummy)))
{
/*
* There is at least one child of this object,
* visit the object
*/
Level++;
ParentHandle = ChildHandle;
ChildHandle = NULL;
}
}
else
{
/*
* No more children in this object, go back up to
* the object's parent
*/
Level--;
/* Delete all children now */
AcpiNsDeleteChildren (ChildHandle);
ChildHandle = ParentHandle;
Status = AcpiGetParent (ParentHandle, &ParentHandle);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
}
}
/* Now delete the starting object, and we are done */
AcpiNsDeleteNode (ChildHandle);
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiNsUnloadNameSpace
*
* PARAMETERS: Handle - Root of namespace subtree to be deleted
*
* RETURN: Status
*
* DESCRIPTION: Shrinks the namespace, typically in response to an undocking
* event. Deletes an entire subtree starting from (and
* including) the given handle.
*
******************************************************************************/
ACPI_STATUS
AcpiNsUnloadNamespace (
ACPI_HANDLE Handle)
{
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (NsUnloadNameSpace);
/* Parameter validation */
if (!AcpiGbl_RootNode)
{
return_ACPI_STATUS (AE_NO_NAMESPACE);
}
if (!Handle)
{
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
/* This function does the real work */
Status = AcpiNsDeleteSubtree (Handle);
return_ACPI_STATUS (Status);
}
#endif
#endif